Black holes



Salon (from Scientific American; May 27) -- Most galaxies have a supermassive black hole lurking at their centers, but a galaxy 10.5 billion light-years away looks like it might have two – and the pair may be set to crash together in just 21 years. “This was a fortuitous catch,” says Stuart Shapiro, a theoretical astrophysicist at Illinois not involved in the research. “We don’t know of another candidate that’s anywhere near that close [to merging].”